package cn.com.code.design;

import cn.com.code.design.agent.Select;

/**
 * @author zhengpei
 * @date 2021/10/23
 */
public interface IUserDao {

  /**
   *
   * @param userId
   * @return
   */
  @Select("select userName from user where id = #{userId}")
  String queryUserInfo(String userId);

}
